I have created some custom Timeline Playables similar to the tutorial blog post by unity Extending Timeline: A Practical Guide
It works in 2019.1 and I can click on the red circle on the track and begin animating. However, when I upgrade the project to 2019.2 the red circle icon isn’t there anymore, and if i try to right-click in the inspector in the property to Add Key nothing happens, the input fields aren’t turning green nor red and no keys are added in the timeline. I can however right-click in the timeline and use Add Key to add keys, and then the animation works.